SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: INSERT INTO bb1_sessions (sessionhash,userid,ipaddress,useragent,lastactivity,request_uri,styleid,langid,authentificationcode) VALUES ('ac9f5b8bf84443ea2bb877fbe08e41cc','0','18.119.172.243','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716198839','addreply.php?action=quote&postid=79346&sid=e4c2be517eebf92e1b4ce705635e8cab','0','0','')
mysql error: Duplicate entry 'ac9f5b8bf84443ea2bb877fbe08e41cc' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 20.05.2024 @ 11:53
Script: /addreply.php?action=quote&postid=79346&sid=e4c2be517eebf92e1b4ce705635e8cab
Referer: